Preparation of synthetic resins



Patented Dec. 30, 1941 UNITED STATES PATENT OFFlCE PREPARATION OFSYNTHETIC RESINS John Kenson Simons, Dormont, Pa., assignor to PlaskonCompany, Inc., Toledo, Ohio, a corporation of Delaware No Drawing.Application December 9, 1938, Serial No. 244,805

3 Claims.

The principal object of the invention is thepreparation of stablepolysulfone resins. More specific objects and advantages are apparent.

from the description. which merely discloses and illustrates theinvention and is not intended to impose limitations upon the claims.

The polysulfone resin of the present invention has the general formulaR.1:(SO2) 12, in which 1 is an aliphatic radical having two carbonatoms, not directly connected, to which two S02 groups are attached, andR is an aromatic radical, having two different carbon atoms to which twoS02 groups are attached. It may be prepared by reacting an aliphaticpclyhalide, having two carbon atoms, not directly connected, to whichtwo halogen atoms are attached, with a polysulfinate having the generalformula (RCSOa-M) in which M is a metal, and R is an aromatic radicalhaving two different carbon atoms to which two S02 groups are attached,not directly connected, to which two S02 groups are attached. Thisreaction is preferably carried out by heating the ingredients in thepresence of water. It is desirable to select a polyhalide and apolysulfinate such that a soluble metal chloride is formed. Theresulting resin may then be admixture with various modifying agents maybe prepared by grinding'fillers that have been impregnated with theresins, or simply by grinding the resins together with other ingredientsThe resulting powders may then be granulated. or compressed into blanksor preforms of the proper size for use in various molds. The resins maybe cast, extruded, molded or formed in any other manner desired. Theymay also be incorporated with a great variety of other resins orpotential resins to produce blended products of any desired properties.

Example 1 4.2 grams of dichloro ethyl ether (ClCH2--CH2O-CH2-CHz-Cl) 4.0grams of potassium benzene-mdisulfinate Example 2 34.0 grams of sodiumbenzene-m-disulfinate, 19.5 grams of dichloro ethyl ether, and 20 c. c.of waterare refluxed for 14 hours, and the water and unreacted chlorideare then distilled off in an oil bath at 210 C. After the cooled residuehas been washed with dilute acid and then with water, it is dehydratedby heating in an open vessel. The resulting resin is similar to that ofExample 1.

Various embodiments of the invention may be devised to meet variousrequirements.

Having described my invention, I claim:

1. A method pf preparing synthetic resins that comprises reactihg..dichloro ethyl ether with a benzene-m-disulfinate of an alkali metal.

2. A method of preparing synthetic resins that comprises heatingdichloro ethyl ether in the presence of water with abenzene-m-disulflnate of an alkali metal.

3. A stable polysulfone resin prep cordance with the method of claim 1.

ared in ac- JOHN KENSON SIMONS.

I CERTIFICATE OF CORRECTION. Patent No. 2,268,062. December 50, 1914.1.

' JOHN mson SIMONS.

It is hereby certified that error appears in the printed specificationof the above numbered patent requiring correction as follows; Firstcolumn, line 27, in the formula, strike out the parenthesis before "R";lines 51, 52 and 55, strike out not directly connected, to which two S0groups are attached--;.and that the said Letters Patent should be readwith this correction therein that the same may confonn to the record ofthe case in the Patent Office.

Signed and sealed this 5rd day of March, A. D. 19J+2.

Henry Van Arsdale, (S l) Acting Commissioner of Patents.

